BJU Science 7 Chapter 4

Which of the following is a phenotype?

• Bb

• black fur

• a pea plant

• a Punnett Square

Tags

NGSS.MS-LS4-4

Gregor Mendel used pea plants to study heredity for all of the following reasons except

• that it was relatively easy to cross different pea plants in order to observe the resulting offspring.

• that their characteristics, like pod color and height, were easy to observe.

• that the characters Mendel studied had at least two identifiable traits.

• that many characters such as pod color and seed shape were controlled by a dozen or more interacting genes.

A population of foxes migrates into a desert region. The number of foxes with larger ears is likely to

• increase

• decrease

• remain the same

• change randomly

A Tt plant is crossed with a tt plant. What genotype(s) would you expect the offspring to have?

• All Tt

• All tt

• Some Tt and some tt

• Some TT, some Tt, and some tt

Tags

NGSS.HS-LS3-1

Both traits are present in hybrid offspring, but without blending.

• codominance

• incomplete dominance

• polygenic inheritance

• simple dominance

What is the process by which organisms with certain adaptations survive to pass on their traits to a greater number of offspring?

• artificial selection

• genetic drift

• natural selection

• population genetics

A black sheep mates with a white sheep. If wool color is an example of incomplete dominance, describe the color of the offspring.

• black

• white

• black and white

• gray

The study of how traits are passed from one generation to the next is called the science of

• heredity

• genetics

• offspring

• genotypes

When Mendel crossed purebred pea plants having green pods with purebred pea plants having yellow pods, the offspring were all

• purebred peas with green pods.

• purebred peas with yellow pods.

• hybrid peas with all green pods.

• hybrid peas with some green and some yellow pods.

Alleles for a dominate trait are represented with ___________ letters.

• uppercase

• lowercase

• Greek

• underlined